Christmas tree stand



FIG. 1 is a top, front perspective view of a Christmas tree stand, showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the drawings represent portions of the Christmas tree stand that form no part of the claimed design. The unshaded surface areas between the solid and broken lines form no part of the claimed design. 

CLAIM The ornamental design for a Christmas tree stand, as shown and described. 